memcheck/tests/custom-overlap.c

   1 // Test for bug 100628:  need to allow custom MALLOCLIKE blocks to overlap
   2 // with normal malloc() blocks in leak-checking -- if it happens, we ignore
   3 // the malloc() block during the leak check.
   4
   5 #include <stdlib.h>
   6 #include "valgrind.h"
   7
   8 int main(void)
   9 {
  10    char* x;
  11
  12    // For this one, the first custom block overlaps exactly with the start of
  13    // the malloc block.
  14    x = malloc(1000);
  15    VALGRIND_MALLOCLIKE_BLOCK(x,     /*szB*/ 16, /*rzB*/0, /*isZeroed*/0);
  16    VALGRIND_MALLOCLIKE_BLOCK(x+100, /*szB*/ 32, /*rzB*/0, /*isZeroed*/0);
  17    VALGRIND_MALLOCLIKE_BLOCK(x+200, /*szB*/ 64, /*rzB*/0, /*isZeroed*/0);
  18    VALGRIND_MALLOCLIKE_BLOCK(x+300, /*szB*/128, /*rzB*/0, /*isZeroed*/0);
  19
  20    // For this one, the first custom block does not overlap exactly with the
  21    // start of the malloc block.
  22    x = malloc(1000);
  23    VALGRIND_MALLOCLIKE_BLOCK(x+100, /*szB*/ 32, /*rzB*/0, /*isZeroed*/0);
  24    VALGRIND_MALLOCLIKE_BLOCK(x+200, /*szB*/ 64, /*rzB*/0, /*isZeroed*/0);
  25    VALGRIND_MALLOCLIKE_BLOCK(x+300, /*szB*/128, /*rzB*/0, /*isZeroed*/0);
  26
  27    return 0;
  28 }